Hydraulic jack.



No. 805,381. PATENTED NOV. 21, 1905.

W. H. RUSSELL. HYDRAULIC JACK.

APPLICATION FILED AUG. 25,1904.

110.805,381. PATENTED Nov.z1,19o5.

` W. H. RUSSELL.

HYDRAULIG JACK. APPLIOATION FILED AUG. 25, 1904.

2 SHEETS-SHEET 2.

u sm Witnesses: In. Inventor,

Attorneys UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed August 25, 1904. Serial No. 222,114.

i To all whom it may con/cern:

Be it known that I, WILLIAM HENDERSON RUSSELL, a subject of the King of Great Britain, residing at Douglastown, county of Northumberland, in the Province of New Brunswick, Canada, have invented certain new and useful Improvements in Hydraulic Jacks; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to new and useful improvements in double acting hydraulic rams; and it consists in certain features of novelty in the construction, arrangement, and operation thereof, whereby a convenient, durable, and simple structure is provided for the purpose of actuating a single ram,which structure possesses great power, and which, owing to peculiarities of detail construction thereof, is very rapid in operation.

The object of the invention is to provide means whereby a hydraulic ram may be produced which will be simplel in construction and in which the ram may be actuated both on the up and down stroke of an actuatinglever or other means used to operate the same, all as hereinafter more fully described, and specifically pointed out iii the claim.

In the annexed drawings, in which similar numerals of reference indicate corresponding parts in all the views, Figure 1 is a vertical sectional view of my improved hydraulic ram taken approximately on the line 1 1 of Fig. 3. Fig. 2 is a similar view taken approximately on line 2 2 of Fig. 1 looking in the direction indicated by the arrow. Fig. 3 is a view partly in plan and partly on the section-line 3 3 of Fig. 1. Fig. 4 is transverse sectional view on the line 44 of Fig. 1. Fig. 5 is a fragmentary detached sectional view taken on the line 5 5 of Fig. 3. Fig. 6 is a fragmentary sectional view taken approximately vertically through one of the reciprocatory plungers shown in Fig. 2 and the contiguous parts cooperating therewith. Fig. 7 is a sectional View of Fig. 6, taken on line 7 7 thereof; and Fig. 8 is a detached detail View illustrating the construction of one of the plungers hereinafter referred to.

Referring to the parts, 9 indicates generally a casing of metal, which is provided upon the interior thereof with the Huid-chamber 10 within the pump operating casing, which chamber 10 communicates with the chamber 10, which surrounds the ram-cylinder hereinafter referred to. The casing 9 is perforated for the passage thereinto of the screwthreaded ram-cylinder 11, which ram-cylinder is by the screw-threads 12 connected with the said casing within the chamber 10a.

The chamber 1() is closed at its upper end by means of the cap 13, which cap is provided with a plurality of piston-ways 14, as best shown in the sectional view, Fig. 2, within which slide the vertically-reciprocatory valvecarrying plungers l5 shown in the detached View, Fig. 8, said members 15 being carried upon the rockable yoke 16 upon the rounded outer end portions 17 thereof, and said members 16 being mounted upon the non-circular portion 18 of the rocking shaft 19, which shaft is journaled in the bridge 20, which bridge projects through the Huid-receptacle 10, as best shown in Fig. 1.

The bridge 20 is hollow and is adapted to serve as a supporting-bearing for the shaft 19, which shaft rocks therein, while a stuffing-box 21 and the packing 22 are provided, surrounding the outer end of the shaft 19 to prevent the escape of oil or other fluid around said shaft and to atmosphere.

The shaft 19 is provided upon its outer end portion with'the lever-seat 23, which may be of any type desired, but which, as shown, comprises an opening within which the lever 24 may be seated, as shown in Fig. 3, for the purpose of rocking said shaft 19, and thereby causing reciprocation of the plungers 15 in the operation of the ram.

Surrounding the lower portion-that is, the v alve portion-#of the plungers 15 are sleeves or tubes 25,which form wells 26,leading downwardly from the fluid-chamber 10, and said sleeves are provided with screw-threads upon the interior thereof, whereby they are conr nected with the upwardly-projecting perforated extensions 27 rising from the conduit member 28, which member 28 is secured in position by means of the screw-threaded engagementof the sleeves 25 and extensions 27, the packing-rings 29 being interposed between the shouldered ends of said parts to prevent leakage of iiuid at the point of junction between said members.

For the purpose of properly positioning the member 28 it is provided with the shoulders 30, which seat themselves in corresponding shoulders in the casing 9 when the parts are screwed to their home position,thereby properly adjusting these parts with relation to each other.

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Within the conduit member 28 and projecting into the perforations of the upward eX- tensions 27 thereof are spring-actuated valves 31, which are held by means of the springs 32 normally in closed position, while the adjusting-screws 33 are provided for the purpose of tensioning said springs when desired.

The lower ends of the plungers are provided with perforations 34, which provide conduits for the passage of oil or other fluid from the interior of the sleeves through the perforated lower ends of the plungers 15, past the valve 36, and into the wells 26 upon the downstroke of the plungers 15, during which stroke the said valves 36, by means of the pressure exerted thereupon, cause the springs 37 to be slightlyT compressed, and when either of the plungers 15 starts upon its return stroke the expansion of said springs 37 automatically seats the valves 36 and prevents the escape of oil or other fluid therebeyond.

Each of the plungers 15 is provided with a valve, as described, which is closed upon its downstroke for the purpose of ejecting oil from the wells 26 past the valves 31 and into the lateral conduit or passages 38, which passages 38 merge in the single passage 39, which extends through said conduit member and through the upward extension 27 thereof below the ram 40.

Between the ram-cylinder 11,eXtension 27a, and the casing 9 is provided packing 41, held in position by means of the screw-threaded rings 42, which rings likewise serve to lock the conduit member in position within the lower portion of the casing 9.

The lower end of the ram 40 is provided with the usual packing' 42a to prevent the escape of oil longitudinally7 thereof around its outer circumference and is in other respects similar to the rams used in ordinary hydraulic rams or jacks, being provided with the capplate or its equivalent 43 for well-understood purposes.

Projecting downwardly through the cap 13 and the shoulder 43a of the casing 9 is a screwthreaded stem 44, the screw-threaded portion of which engages said cap 13 and shoulder 43, while the lower reduced end portion 45 thereof is seated in the annular channel 46, which is cut or formed in the inner end of the shaft 19, thereby locking said shaft in position against longitudinal movement, which would have a tendency to displace the stem and the parts immediately connected therewith.

In the operation of my improved ram or jack the lever 24 is inserted in the opening in the shaft 19, and said shaft is rocked by means of said lever so as to cause alternate rise and fall of the plungers 15, which, as before stated, are carried upon the yoke 16, which is held upon said shaft, during which time oil or other iuid will be forced from the chamber 10 past the valves referred to into the conduits 38 and 39, thence upwardly to the interior of the rain-cylinder 11 below the ram, whereby the ram will be lifted from its lowermost position by means of the force of the oil or other uid within said ram-cylinder.

Owing to the construction ofv the valves cooperating with the plungers little or no oil will pass from the cylinder 15 back to the chamber 10, and the ram will be held in its destined position. When, however, it is desiredto lower the ram, all that is necessary is that the screw-threaded valve 47 be given a partial rotation, whereupon the inner end portion 43 thereofl will be retracted from the port 49, which port establishes communication between the interior of the cylinder 11 and the supplemental oil-chamber 10, and oil will pass from the interior of the cylinder 11 to said chamber 1()a by reason of the weight of the ram bearing upon such oil, and as the chamber 10u is in communication with the chamber 10 it will be evident that the oil is again in position for further service as required.

The valve 47 is seated in a screw-threaded and removable plug 50, (shown in Fig. 5,) which plug is in turn seated in a screw-threaded passage 51 in the casing 9.

It will be noted that the lower ends of the plungers 15 are provided below the valve 36 with the su pplemental inner sleeve 36, which is secured by screw-threaded engagement .with the interior passage in said plungers below said valve 36. Upon the lower ends of these tubes 36 packing-rings 36b are provided, between which and the lower end of the plungers packing 37a is introduced for well-understood purposes.

The cap 13 is provided with a vent-plug 53', consisting of a screw-threaded member provided with longitudinal slots 54 cuttherein, which are only imperfectly closed by screwing said member 53 into position in the cap 13. The said member 53 is composed, preferably, of somewhat resilient metal, so that it will yield to pressureand permit the entrance of atmospheric air to avoid creating a vacuum or partial vacuum in the chamber 10 when oil is pumped therefrom into the cylinder 11, as before described.

While I have shown in the accompanying drawings the preferred form of my invention, it will be understood that I do not limit myself to the precise form shown, for many of the details may be changed in form or position without affecting the operativeness or utility of my invention, and I therefore reserve the right to make all such modifications as are included within the scope of the following claim or of mechanical equivalents to the structures set forth.

It is obvious that if the member 43 is provided with projecting punches and a fixed abutment is arranged in juxtaposition thereto the device may be used as a multiple punch of great power and capacity.

Having described my invention, what I IOO lIO

laim, and desire to secure by Letters Patent, 1s-

In a hydraulic jack, the combination cornprising a casing, a rain-Cylinder disposed in screw-threaded conduit secured to the bottom of each of said wells, a spring-pressed valve disposed in each conduit, a tension-screw disposed beneath ea'oh of said latter valves, the said casing being provided with a channel from said conduits merging into a channel leading to the bottom of the cylinder under the ram, and a slotted vent-plug disposed in the upper part of the casing.

In Witness whereof I have hereunto set my hand in the presence of two witnesses.

WILLIAM HENDERSN RUSSELL.

Witnesses:

FREDERICK H. GIBBs,

JOHN F. DEUFFERWIEL. 

